IHB is a TLA that could mean:

• Indiana Harbor Belt Railroad – AAR reporting mark IHB
• Indiana Historical Bureau [1] (http://www.statelib.lib.in.us/www/ihb/ihb.html)
• International Health Bureau
• International Horse Breeders [2] (http://www.ihb.com.au/)
• Internationale Hotel Börse [3] (http://www.ihbhotels.com/)
• Irish Horse Board [4] (http://www.irishhorseboard.com/)
• Irregular heartbeat

This page expands a two-letter combination or a three-letter abbreviation/acronym (TLA). It aims to include all uses.